Texas Instruments

ADS7813P

ADS7813P Description

The ADS7813P from Texas Instruments is a high-performance 16-bit successive approximation register (SAR) analog-to-digital converter (ADC) designed for precision measurement applications. Housed in a 16-pin DIP (through-hole) package, this obsolete but reliable IC operates with a single 5V analog and digital supply, making it compatible with standard industrial power systems. It features a single-ended input and supports both external and internal voltage references, offering flexibility in system design. With a 40kSPS sampling rate and a 1:1 sample-and-hold (S/H) to ADC ratio, the ADS7813P delivers accurate, low-latency conversions ideal for real-time signal processing.

ADS7813P Features

• 16-Bit Resolution: Ensures high-precision analog-to-digital conversion for demanding applications.
• SPI Interface: Enables straightforward communication with microcontrollers or DSPs.
• Single 5V Supply: Simplifies power management by eliminating dual-supply requirements.
• Internal/External Reference: Supports system-level accuracy optimization.
• 40kSPS Sampling Rate: Balances speed and resolution for dynamic signal acquisition.
• Single-Ended Input: Reduces complexity in single-channel measurement systems.
• ROHS3 Compliant: Meets environmental standards despite its obsolete status.

ADS7813P Applications

The ADS7813P excels in applications requiring high-resolution, moderate-speed ADCs, such as:

• Industrial Process Control: Precise sensor monitoring (e.g., temperature, pressure).
• Medical Instrumentation: Low-noise data acquisition for diagnostic equipment.
• Test and Measurement Systems: Bench instruments requiring 16-bit accuracy.
• Legacy System Upgrades: Replacement for older 16-bit ADCs in through-hole designs.

Conclusion of ADS7813P

While marked obsolete, the ADS7813P remains a robust choice for engineers seeking a 16-bit SAR ADC with SPI compatibility and 5V operation. Its combination of resolution, speed, and flexible reference options makes it suitable for precision applications where newer surface-mount alternatives are impractical. For legacy systems or projects requiring through-hole components, the ADS7813P offers a proven, high-performance solution.